Acquisitions and Dispositions - Financial results from discontinued operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Costs and expenses
Income tax expense									$ 0	$ (19)	$ 10
(Loss) income from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ 0	$ (321)	$ 325	$ 196	$ (3,793)	$ 0	$ (3,593)	$ 147
Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]										(Loss) income from discontinued operations, net of tax	(Loss) income from discontinued operations, net of tax
Net gains (losses) on investments and derivatives
Revenues
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]									Net gains (losses) on investments and derivatives	Net gains (losses) on investments and derivatives	Net gains (losses) on investments and derivatives
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]									Net gains (losses) on investments and derivatives	Net gains (losses) on investments and derivatives	Net gains (losses) on investments and derivatives
Discontinued Operations, Held-for-sale
Revenues
Life premiums and contract charges										$ 1,109	$ 1,350
Net investment income										1,336	1,262
Net gains (losses) on investments and derivatives										195	269
Total revenues										2,640	2,881
Costs and expenses
Life contract benefits										1,315	1,726
Interest credited to contractholder funds										414	605
Amortization of DAC										87	153
Operating costs and expenses										163	238
Restructuring and related charges										31	7
Total costs and expenses										2,010	2,729
Amortization of deferred gain on reinsurance										4	4
Income from discontinued operations before income tax expense										634	156
Income tax expense										136	9
Income from discontinued operations, net of tax										498	147
Loss on disposition of operations										(4,315)	0
Income tax benefit										(224)	0
Loss on disposition of operations, net of tax										$ (4,091)	$ 0